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Allspice is the dried fruit of the P. dioica plant. The fruits are picked when green and unripe and are traditionally dried in the sun. When dry, they are brown and resemble large, brown, smooth peppercorns. The whole fruits have a longer shelf life than the powdered product, and produce a more aromatic product when freshly ground before use.

Fresh leaves are used where available. They are similar in texture to bay leaves, thus are infused during cooking and then removed before serving. Unlike bay leaves, they lose much flavor when dried and stored, so do not figure in commerce. The leaves and wood are often used for smoking meats where allspice is a local crop. Allspice can also be found in essential oil form.

Allspice is one of the most important ingredients of Caribbean cuisine. It is used in Caribbean jerk seasoning (the wood is used to smoke jerk in Jamaica, although the spice is a good substitute), in moles, and in pickling; it is also an ingredient in commercial sausage preparations and curry powders. Allspice is also indispensable in Middle Eastern cuisine, particularly in the Levant, where it is used to flavour a variety of stews and meat dishes. In Arab cuisine, for example, many main dishes call for allspice as the sole spice added for flavouring.

In the United States, it is used mostly in desserts, but it is also responsible for giving Cincinnati-style chili its distinctive aroma and flavor. Allspice is commonly used in Great Britain, and appears in many dishes, including cakes. Even in many countries where allspice is not very popular in the household, as in Germany, it is used in large amounts by commercial sausage makers. In the West Indies, an allspice liqueur called is produced under the name "pimento dram" due to conflation of pimenta and pimento.[a]

The allspice tree, classified as an evergreen shrub, can reach 10–18 m (33–59 ft) in height. Allspice can be a small, scrubby tree, quite similar to the bay laurel in size and form. It can also be a tall, canopy tree, sometimes grown to provide shade for coffee trees planted underneath it. It can be grown outdoors in the tropics and subtropics with normal garden soil and watering. Smaller plants can be killed by frost, although larger plants are more tolerant. It adapts well to container culture and can be kept as a houseplant or in a greenhouse.

To protect the pimenta trade, the plant was guarded against export from Jamaica. Many attempts at growing the pimenta from seeds were reported, but all failed. At one time, the plant was thought to grow nowhere except in Jamaica, where the plant was readily spread by birds. Experiments were then performed using the constituents of bird droppings; however, these were also totally unsuccessful. Eventually, passage through the avian gut, whether due to the acidity or the elevated temperature, was found to be essential for germinating the seeds. Today, pimenta is spread by birds in Tonga and Hawaii, where it has become naturalized on Kauaʻi and Maui.[5]

Allspice (P. dioica) was encountered by Christopher Columbus on the island of Jamaica during his second voyage to the New World, and named by Dr. Diego Álvarez Chanca. It was introduced into European and Mediterranean cuisines in the 16th century. It continued to be grown primarily in Jamaica, though a few other Central American countries produced allspice in comparatively small quantities.[6]